After click Zimbra Drive - "A server error has occured. Unable to connect server. Retry."Log from mailbox.log:2018-01-10 08:07:16,276 WARN [qtp1622006612-2393:https:https://mail.bank.local:8443/service/soap/BatchRequest] [name=pz@mail.bank.local;mid=3;ip=xxxx;port=65345;ua=ZimbraWebClient - FF57 (Win)/8.8.5_GA_1894;] SoapEngine - handler exceptionjava.lang.RuntimeException: org.apache.http.client.HttpResponseException: Internal Server Error at com.zextras.zimbradrive.soap.GetAllFoldersHdlr.handleRequest(GetAllFoldersHdlr.java:60) at org.openzal.zal.soap.InternalDocumentHelper.handle(InternalDocumentHelper.java:75) at org.openzal.zal.soap.InternalDocumentHandler.handle(InternalDocumentHandler.java:42) at com.zimbra.soap.SoapEngine.dispatchRequest(SoapEngine.java:607) at com.zimbra.soap.SoapEngine.dispatch(SoapEngine.java:440) at com.zimbra.soap.SoapEngine.dispatch(SoapEngine.java:273) at com.zimbra.soap.SoapServlet.doWork(SoapServlet.java:303) at com.zimbra.soap.SoapServlet.doPost(SoapServlet.java:213) at javax.servlet.http.HttpServlet.service(HttpServlet.java:707) at com.zimbra.cs.servlet.ZimbraServlet.service(ZimbraServlet.java:206) at javax.servlet.http.HttpServlet.service(HttpServlet.java:790) at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:821) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1685) at com.zimbra.cs.servlet.CsrfFilter.doFilter(CsrfFilter.java:169) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1668) at com.zimbra.cs.servlet.RequestStringFilter.doFilter(RequestStringFilter.java:54) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1668) at com.zimbra.cs.servlet.SetHeaderFilter.doFilter(SetHeaderFilter.java:59) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1668) at com.zimbra.cs.servlet.ETagHeaderFilter.doFilter(ETagHeaderFilter.java:47) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1668) at com.zimbra.cs.servlet.ContextPathBasedThreadPoolBalancerFilter.doFilter(ContextPathBasedThreadPoolBalancerFilter.java:107) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1668) at com.zimbra.cs.servlet.ZimbraQoSFilter.doFilter(ZimbraQoSFilter.java:116) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1668) at com.zimbra.cs.servlet.ZimbraInvalidLoginFilter.doFilter(ZimbraInvalidLoginFilter.java:117) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1668) at org.eclipse.jetty.servlets.DoSFilter.doFilterChain(DoSFilter.java:473) at org.eclipse.jetty.servlets.DoSFilter.doFilter(DoSFilter.java:318) at org.eclipse.jetty.servlets.DoSFilter.doFilter(DoSFilter.java:288) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1668) at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:581) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143) at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:524) at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:226) at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1158) at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:511) at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:185) at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1090) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141) at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:213) at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:109) at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:119) at org.eclipse.jetty.rewrite.handler.RewriteHandler.handle(RewriteHandler.java:318) at org.eclipse.jetty.server.handler.gzip.GzipHandler.handle(GzipHandler.java:437) at org.eclipse.jetty.server.handler.DebugHandler.handle(DebugHandler.java:84) at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:119) at org.eclipse.jetty.server.Server.handle(Server.java:517) at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:306) at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:242) at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:261) at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:95) at org.eclipse.jetty.io.ssl.SslConnection.onFillable(SslConnection.java:192) at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:261) at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:95) at org.eclipse.jetty.io.SelectChannelEndPoint$2.run(SelectChannelEndPoint.java:75) at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.produceAndRun(ExecuteProduceConsume.java:213) at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.run(ExecuteProduceConsume.java:147) at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:654) at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:572) at java.lang.Thread.run(Thread.java:748)Caused by: org.apache.http.client.HttpResponseException: Internal Server Error at org.apache.http.impl.client.AbstractResponseHandler.handleResponse(AbstractResponseHandler.java:69) at org.apache.http.impl.client.BasicResponseHandler.handleResponse(BasicResponseHandler.java:65) at com.zextras.zimbradrive.soap.GetAllFoldersHdlr.handleRequest(GetAllFoldersHdlr.java:52) ... 60 more

Can anyone help me in this situation?I've been working on this two weeks and I do not know what to do next.